Typical Single-Story Framing Section This information bulletin describes the items how to prepare a typical framing section for single-story residential construction. One or more framing sections will be required as part of plans submitted for approval prior to permit issuance. Additional information on the preparation of plans for a single dwelling unit can be found in “California Building Code”. 1. What is a Framing Section? The California Building Code specifies that, for single-family residential construction, all framing members shall be “anchored, tied and braced so as to develop the strength and rigidity necessary for the purposes for which they are to be used”. A framing section is a cutaway view of the proposed construction that is used to show how these requirements are met. Depending on the design of your project, you may need to include more than one framing section. You must clearly show deviations in your sections wherever they occur. Included in this bulletin are illustrations showing several typical framing sections and details. The illustrations depict conventional wood construction. All framing sections should be cross-referenced on the building plans using the floor, foundation and/or roof framing views. See Figure 1. All framing sections should include enlarged views that detail roof and floor connections as well as lumber and footing sizes. 2. Typical Framing Sections Included in this bulletin are the following typical cross section views: Figure 2 illustrates a framing section, slab floor with ceiling joist Figure 3 illustrates a framing section, slab floor with vaulted ceiling Figure 4 illustrates a framing section, raised floor with ceiling joists Figure 5 illustrates a framing section, slab floor with shed roof 3. Typical Details Included in this bulletin are the following typical details: Detail A illustrates a typical roof ridge connection when using rafters and ceiling joists (from Figure 4) Detail B illustrates a typical ridge beam connection when rafters are load bearing and ceiling joists will not be used (from Figure 3) Detail C illustrates a typical roof connection showing rafters and ceiling joists attached to bearing walls (from Figures 2 and 4) Detail D illustrates a typical roof connection showing a vaulted ceiling without ceiling joists attached to bearing walls (from Figure 3) Detail E illustrates a typical shed roof connection attached to bearing walls (from Figure 5) Detail F illustrates a typical bearing wall connection to a continuous footing with slab floor construction (from Figures 2, 3 and 5) Detail G illustrates a typical bearing wall connection to a continuous footing with raised floor construction (from Figure 4) Detail H illustrates a typical girder construction to an interior pad footing for raised floor construction (from Figure 4 Page 1 of 12 200 Civic Center Drive * Vista, CA 92084 * 760-639-6100 * Fax 760-639-6101 (Updated 07/2014) 4. Span Tables TABLE 2308.10.3 (2) RAFTER SPANS FOR COMMON LUMBER SPECIES (Roof Live Load = 20 pounds per square foot, ceiling not attached to rafters, L/Δ = 240) DEAD LOAD = 10 pounds per square foot DEAD LOAD = 20 pounds per square foot RAFTER 2 x 4 2 x 6 2 x 8 2 x 10 2 x 12 2 x 4 2 x 6 2 x 8 2 x 10 2 x 12 SPACING SPECIES AND Maximum rafter spans (inches) GRADE (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) Douglas Fir-Larch SS 10-5 16-4 21-7 ---- ---- 10-5 16-4 21-7 ---- ---- Douglas Fir-Larch #1 10-0 15-9 20-10 ---- ---- 10-0 15-4 19-5 23-9 ---- 12 Douglas Fir-Larch #2 9-10 15-6 20-5 25-8 ---- 9-10 14-4 18-2 22-3 25-9 Douglas Fir-Larch #3 8-7 12-6 15-10 19-5 22-6 7-5 10-10 13-9 16-9 19-6 Douglas Fir-Larch SS 9-6 14-11 19-7 25-0 ---- 9-6 14-11 19-7 24-9 ---- Douglas Fir-Larch #1 9-1 14-4 18-11 23-9 ---- 9-1 13-3 16-10 20-7 23-10 16 Douglas Fir-Larch #2 8-11 14-1 18-2 22-3 25-9 8-6 12-5 15-9 19-3 22-4 Douglas Fir-Larch #3 7-5 10-10 13-9 16-9 19-6 6-5 9-5 11-11 14-6 16-10 Douglas Fir-Larch SS 8-11 14-0 18-5 23-7 ---- 8-11 14-0 18-5 22-7 ---- Douglas Fir-Larch #1 8-7 13-6 17-9 21-8 25-2 8-4 12-2 15-4 18-9 21-9 19.2 Douglas Fir-Larch #2 8-5 13-1 16-7 20-3 23-6 7-9 11-4 14-4 17-7 20-4 Douglas Fir-Larch #3 6-9 9-11 12-7 15-4 17-9 5-10 8-7 10-10 13-3 15-5 Douglas Fir-Larch SS 8-3 13-0 17-2 21-10 ---- 8-3 13-0 16-7 20-3 23-5 Douglas Fir-Larch #1 8-0 12-6 15-10 19-5 22-6 7-5 10-10 13-9 16-9 19-6 24 Douglas Fir-Larch #2 7-10 11-9 14-10 18-2 21-0 6-11 10-2 12-10 15-8 18-3 Douglas Fir-Larch #3 6-1 8-10 11-3 13-8 15-11 5-3 7-8 9-9 11-10 13-9 TABLE 2308.10.2 (2) CEILING JOIST SPANS FOR COMMON LUMBER SPECIES (Uninhabitable Attics with Limited Storage, Live Load = 20 pounds per square foot, L/Δ = 240) CEILING DEAD LOAD = 10 pounds per square foot JOIST 2 x 4 2 x 6 2 x 8 2 x 10 SPACING Maximum ceiling joist spans (inches) SPECIES AND GRADE (ft._in.) (ft._in.) (ft._in.) (ft._in.) Douglas Fir-Larch SS 10-5 16-4 21-7 ---- Douglas Fir-Larch #1 10-0 15-9 20-1 24-6 12 Douglas Fir-Larch #2 9-10 14-10 18-9 22-11 Douglas Fir-Larch #3 7-8 11-2 14-2 17-4 Douglas Fir-Larch SS 9-6 14-11 19-7 25-0 Douglas Fir-Larch #1 9-1 13-9 17-5 21-3 16 Douglas Fir-Larch #2 8-9 12-10 16-3 19-10 Douglas Fir-Larch #3 6-8 9-8 12-4 15-0 Douglas Fir-Larch SS 8-11 14-0 18-5 23-4 Douglas Fir-Larch #1 8-7 12-6 15-10 19-5 19.2 Douglas Fir-Larch #2 8-0 11-9 14-10 18-2 Douglas Fir-Larch #3 6-1 8-10 11-3 13-8 Douglas Fir-Larch SS 8-3 13-0 17-1 20-11 Douglas Fir-Larch #1 7-8 11-2 14-2 17-4 24 Douglas Fir-Larch #2 7-2 10-6 13-3 16-3 Douglas Fir-Larch #3 5-5 7-11 10-0 12-3 Page 2 of 12 TABLE 2308.8 (2) FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES (Residential Living Areas, Live Load = 40psf, L/Δ = 360) DEAD LOAD = 10 psf DEAD LOAD = 20 psf JOIST 2 x 6 2 x 8 2 x 10 2 x 12 2 x 6 2 x 8 2 x 10 2 x 12 SPACING SPECIES AND GRADE Maximum rafter spans (inches) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) (ft._in.) Douglas Fir-Larch SS 11-4 15-0 19-1 23-3 11-4 15-0 19-1 23-3 Douglas Fir-Larch #1 10-11 14-5 18-5 22-0 10-11 14-2 17-4 20-1 12 Douglas Fir-Larch #2 10-9 14-2 17-9 20-7 10-6 13-3 16-3 18-10 Douglas Fir-Larch #3 8-8 11-0 13-5 15-7 7-11 10-0 12-3 14-3 Douglas Fir-Larch SS 10-4 13-7 17-4 21-1 10-4 13-7 17-4 21-0 Douglas Fir-Larch #1 9-11 13-1 16-5 19-1 9-8 12-4 15-0 17-5 16 Douglas Fir-Larch #2 9-9 12-7 15-5 17-10 9-1 11-6 14-1 16-3 Douglas Fir-Larch #3 7-6 9-6 11-8 13-6 6-10 8-8 10-7 12-4 Douglas Fir-Larch SS 9-8 12-10 16-4 19-10 9-8 12-10 16-4 19-2 Douglas Fir-Larch #1 9-4 12-4 15-0 17-5 8-10 11-3 13-8 15-11 19.2 Douglas Fir-Larch #2 9-1 11-6 14-1 16-3 8-3 10-6 12-10 14-10 Douglas Fir-Larch #3 6-10 8-8 10-7 12-4 6-3 7-11 9-8 11-3 Douglas Fir-Larch SS 9-0 11-11 15-2 18-5 9-0 11-11 14-9 17-1 Douglas Fir-Larch #1 8-8 11-0 13-5 15-7 7-11 10-0 12-3 14-3 24 Douglas Fir-Larch #2 8-1 10-3 12-7 14-7 7-5 9-5 11-6 13-4 Douglas Fir-Larch #3 6-2 7-9 9-6 11-0 5-7 7-1 8-8 10-1 5. Completing Your Framing Section Items such as the size of all framing members, interior and exterior finishes, as well as the roof and floor covering must be specified on the plan.